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Thermoplastic composition

a technology of thermoplastics and compositions, applied in the field of thermoplastic compositions, can solve the problems of production costs increasing, less efficient processing in expensive extruder-type equipment, etc., and achieve the effects of less efficient processing, production costs increasing, and higher tinctorial strengths

Active Publication Date: 2014-11-04
LUBRIZOL ADVANCED MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a new dispersant that can improve the efficiency of processing in expensive extruder-type equipment, which can save money and reduce production costs. The dispersant helps reduce aggregates and specks, improves brightness, strength, and faster rates of dispersion. By using a solid dispersant, the pigment particles can be more evenly mixed within the thermoplastic, avoiding agglomeration. This new dispersant has been found to reduce filter blocking, improve tinctorials, and allow for higher pigment loadings for equivalent viscosity of masterbatches while also reducing speck levels. The patent provides a solution for improving the performance of thermoplastic compositions.

Problems solved by technology

Any of the problems mentioned above can lead to less efficient processing in expensive extruder-type equipment, i.e., production costs increase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1 (

EX1)

[0068]2,2-bis(hydroxymethyl)propionic acid (Ex Aldrich Chemical, 35.7 parts) and epsilon-caprolactone (Ex Aldrich Chemical, 364.3 parts) are stirred together under a nitrogen atmosphere at 80° C. o-Phosphoric acid (1.2 parts) is added, prior to reaction temperature being increased to 120° C. Stirring is continued under these conditions for 6 hours. The molten solid is poured into steel trays and allowed to cool to ambient temperature. The resulting pale cream wax is frozen with liquid nitrogen and broken into lumps. The resulting lumps are milled to a powder fine enough to pass through a 1 mm sieve.

examples 2 (

EX2)

[0069]The product of Example 1 (87.47 parts) and behenic acid (Ex Aldrich Chemical, 39.6 parts) are stirred together under a nitrogen atmosphere at 120° C. Zirconium (IV) butoxide (0.38 parts) is added, prior to reaction temperature being increased to 180° C. Stirring is continued under these conditions for 20 hours. The molten solid is poured into steel trays and allowed to cool to ambient temperature. The resulting pale yellow wax is frozen with liquid nitrogen and broken into lumps. The resulting lumps are milled to a powder fine enough to pass through a 1 mm sieve. Acid value is measured as 34.2 mg KOH / g.

example 3 (

EX3)

[0070]The product of Example 1 (92.3 parts) and stearic acid (Ex Aldrich Chemical, 34.9 parts) are stirred together under a nitrogen atmosphere at 120° C. Zirconium (IV) butoxide (0.38 parts) is added, prior to reaction temperature being increased to 180° C. Stirring is continued under these conditions for 20 hours. The molten solid is poured into steel trays and allowed to cool to ambient temperature. The resulting pale yellow wax is frozen with liquid nitrogen and broken into lumps. The resulting lumps are milled to a powder fine enough to pass through a 1 mm sieve. Acid value is measured as 33.5 mg KOH / g.

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Abstract

The invention relates to a composition containing a particulate solid, a plastic material and a compound obtained / obtainable by a process comprising (i) reacting at a temperature of 12O° C. or less, or 100° C. or less a hydroxycarboxylic acid and a lactone; and (ii) optionally reacting the product of (i) with a C1-50 carboxylic acid. The invention further relates to novel compounds, and the use of the compound as a dispersant in a plastic material.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority from PCT Application Serial No. PCT / US2010 / 041147 filed on Jul. 7, 2010, which claims the benefit of U.S. Provisional Application No. 61 / 223,545 filed on Jul. 7, 2009.FIELD OF INVENTION[0002]The invention relates to a composition containing a particulate solid, a plastic material (such as a thermoplastic polymer) and a compound capable of being a dispersant.BACKGROUND OF THE INVENTION[0003]Thermoplastics such as PP (polypropylene), PE (polyethylene), etc., are normally coloured using pigment concentrates which are usually called masterbatches or compounds. These concentrates are prepared by mixing ingredients together and subjecting them to any of the processes commonly used for dispersing particulate solids in a thermoplastic polymer. Compounding or mixing in a twin-screw extruder is one of these processes. Pigment concentrations in these masterbatches may be from 20-70% and other additives may be present ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08K5/00C08L91/06C09B67/20C09K23/36
CPCC09B67/0064C08J3/226C08J2423/06C08G63/08C08G63/823C08J3/18C08J3/20C08L67/06
Inventor THETFORD, DEAN
Owner LUBRIZOL ADVANCED MATERIALS INC
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